Electromagnetic talking device



July 21, 1936. s. BEGUN ET AL 4 ELECTROMAGNETIC TALKING DEVICE Filed March '7, 1935 [ALL] fiWezzfohsfi' Semi Began War/fer We/cfie 5066 Patented July 21, 1936 UNITED STATES PATENT OFFICE I Semi Begun, Berlin, and Walter Weiche, Berlin- Mariendorf, Germany, assignors to C. Loren:

Aktiengesellschai't, many, a company Berlin-Tempelhof, Ger- Application March 7, 1935, Serial No. 9,758 In Germany March 8, 1934 Claims.

For use with electromagnetic talking devices on the Poulsen principle sound recording and reproducing arrangements, the so-called talking heads, are known which are made in two parts hinged to each other. It is known also to provide such heads with guide ways which are to hold the sound record carrier, which is a steel wire or tape, in the best position with respect to the magnet cores. The constructions, however, proposed heretofore have the disadvantage that th wire or tape must be threaded into these guide ways.

The invention has for its object to so construct the talking head that no such troublesome manipulation shall be necessary. For this purpose, guides are arranged to bring the sound record carrier automatically in the proper position with respect to the magnet cores when the head becomes closed.

One embodiment of the invention is described hereafter by way of example, reference being had to the accompanying drawing in which Fig. 1 is an end view of the talking head, shown as closed, Fig. 2 is a similar view to Fig. 1, the talking head shown as open, Fig. 3 is a plan to Fig. 2.

The talking head consists of two parts I and 2 fixed to each other by a hinge 3. Helical springs 4 act to close the head I, 2 so as to hold the two parts in their operative position. Rigidly attached to the parts I and 2 are guide pieces 5, made of brass, for example. The shape of the pieces 5 will be seen from Fig. 2. The sound record carrier is a steel wire 6. The guide pieces 5 are arcuate at their upper edges and overlap each other in such manner that two adjacent pieces 5, irrespective of the angle to which the talking head is opened, complete one another to form common curved surface 1 for the wire 8 to rest upon.

In this way, for arranging the wire 6 all that is necessary is to open the head I, 2 by hand against the action of the springs 4 and to lay the wire onto the surface I and finally to reclose the head.

In order to.ensure that the wire is safely guided until the head has been closed completely, each guide piece 5 has a second curved or arcuate edge 8 so disposed above the surface I as to prevent the wire from jumping out of the head when this closes. The pieces 5 thus are in the nature of grippers, which act to bring the wire in the proper position to the cores 8 of the magnet coils III. In the drawing, two pairs of such grippers are represented. It will be apparent, however, that any suitable number thereof may be provided.

When the head is closing, the pieces 5 enter notches l8 provided in the parts I, 2.

The cores 9 are in a well-known manner flush with the grooves ll provided in the parts I, 2 to encompass the wire 6 when the talking head has been closed. Equally, the coils III are flush with the inner surfaces of the parts I, 2.

If the head is in its closed state, i. e. that shown in Fig. 1, the parts- I and 2 are pressed against each other by the springs 4 which thus tend to hold the talking head closed. With the position represented in Fig. 2 the springs 4 tend to maintain the talking head in its open position. Owing to this arrangement the head can be opened simply by exerting a pressure on the parts I and 2, when the head is fitted with wire 6 in the manner described and then by a second pressure caused to collapse.

It is to be understood that changes may be made within the scope indicated by the appended claims. For instance, the guide pieces 5 may be dispensed with, although they are particularly advantageous when used in conjunction with the described arrangement of the springs 4.

What is claimed is: 4

1. A talking head for an electromagnetic talking machine comprising relatively movable portions adapted to close around a record wire, supporting surfaces which provide an open receiving support for the wire when said movable portions are open and auxiliary surfaces adapted to constrain the wire into correct talking position during the closure of said movable portions.

2. A talking head for an electromagnetic talking machine comprising two relatively movable hinged portions adapted to close together around a filamentary record carrier and comprising guide pieces shaped so as to provide an open guide for said filamentary record carrier when said movable portions are open and to guide the carrier into correct talking position when said movable portions come together.

3. In an electromagnetic talking head having portions adapted to be opened or closed about a record filament, guide pieces shaped to provide a substantially continuous supporting surface for the filament in every position of said portions, said surface being open to receive the filament when said portions are open, and said surface being positioned to support the carrier in correct talking relation to the head when said portions are closed. I

4. A talking head for an electromagnetic talking machine comprising relativelymovable portions adapted to close around a record wire in combination with means for elastically maintaining said movable portions in either their open or their closed position, and guide surfaces open when said portions are open, so disposed as to guide said wire into correct talking position during the closure of said portions.

5. An electromagnetic talking head comprising guide parts hinged to one another and adapted to close around a record filament, spring means 

